root@server [/var/log]# grep user /var/log/exim_mainlog 2007-01-07 10:32:37 H=(test.DNSreport.com) [18.104.22.168]:48867 I=[xxx.xxx.67.xxx]:25 F=<> rejected RCPT <firstname.lastname@example.org>: No Such User Here 2007-01-07 10:32:37 H=test.dnsstuff.com (test.DNSreport.com) [22.214.171.124]:48867 I=[xxx.xxx.67.xxx]:25 incomplete transaction (QUIT) from <> for email@example.com One domain is not able to send emails. It is listed in localdomains, userdomains, trueuserdomains and I ran eximup --force. I did a dns check, looks good. What else could be the problem? telnet customer.com 25 Trying xxx.xxx.67.xxx... Connected to customer.com (xxx.xxx.67.xxx). Escape character is '^]'. 220-server.host.com ESMTP Exim 4.63 #1 Sun, 07 Jan 2007 10:50:07 -0600 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail. I ran reseteximtodefaults and forced exim upgrade again, no fix.